//
//  LGMainTabBar.swift
//  longWeb
//
//  Created by 叶剑龙 on 15/12/15.
//  Copyright © 2015年 cn.long. All rights reserved.
//

import UIKit

class LGMainTabBar: UITabBar {
    
    private let count = 5

    override func layoutSubviews() {
        super.layoutSubviews()
        
        let width = self.bounds.width / CGFloat(count)
        
        let frame = CGRect(x: 0, y: 0, width: width, height: self.bounds.height)
        
        var index = 0
        
        for view in self.subviews {
            //is：判断类型
            if view is UIControl && !(view is UIButton) {
                //重新设置frame
                view.frame = CGRectOffset(frame, CGFloat(index) * width, 0)
                index += index == 1 ? 2 : 1
            }
        }
        composeButton.frame = CGRectOffset(frame, width * 2, 0)
    }
    
    //MARK: - 懒加载
    //加号按钮
    lazy var composeButton: UIButton = {
        let button = UIButton()
        
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        button.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        button.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        
        self.addSubview(button)
        return button
        
    }()
}
